51631023 has 8 divisors (see below), whose sum is σ = 72890928. Its totient is φ = 32395904.

The previous prime is 51631009. The next prime is 51631039. The reversal of 51631023 is 32013615.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51631023 - 2⁴ = 51631007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51631823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 506136 + ... + 506237.

It is an arithmetic number, because the mean of its divisors is an integer number (9111366).

Almost surely, 2^51631023 is an apocalyptic number.

51631023 is a deficient number, since it is larger than the sum of its proper divisors (21259905).

51631023 is a wasteful number, since it uses less digits than its factorization.

51631023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1012393.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 51631023 is about 7185.4730533208. The cubic root of 51631023 is about 372.3661918989.

Adding to 51631023 its reverse (32013615), we get a palindrome (83644638).

The spelling of 51631023 in words is "fifty-one million, six hundred thirty-one thousand, twenty-three".